Improvement in metal stamping, shearing, and punching machines



J., T. BEDFORD. Metal Stamping, Shearing and Punchi'ngfMaohine.

P t ted Sept. 17,1878.

AINVENTOR: 0 2 7 WITNESSE ATTORNEYS.

TO-LJTHOGRAP WASHINGTON D. C.

UNITED STATES PATE TOEEIoE.

JOSEPH T. BEDFORD, on NEW YORK, N. Y.

IMPROVEMENT IN METAL STAMPING, SHEARING, AND PUNCl-HNG MACHINES.

Specification forming part of Letters Patent No. 208,009, datedSeptember 17, 1878 application filed January 19, 1878.

a hand-lever with a heavily-weighted lever or pendulum mounted on apivot, and carrying an eccentric, whose rod is connected with the slideof a stamping, shearing, or punching machine. p

The invention also consists in a novel device for stopping the action ofthe slide of the punching or stamping machine while the pendultnn ispermitted tooscil-late.

The object of my invention is to provide a simple and powerful .machinefor stamping, shearing, and punching, which shall, with the expenditureof a small amount of power, perform the heavier kinds of work.

Referring to the drawing, A is the foundation or base-piece,-upon whichthere are two cars, 13, one at each side of an opening in the bed, thatreceives the upper bifurcated end, a, of the lever O, in which issecured an eccentric, I), whose pivot c is supported by the ears B. Theaxis of the eccentric is placed on a horizontal line drawn through itspivot, or is removed ninety degrees from the line of pressnre.

To the lower tnd of the lever G a heavy weight, D, is secured. Thisweight may be made adjustable on the lever, when it may be moved nearerthe pivot for light work.

A. lever, E,is secured to the side of the lever O, which is connected bytwo links, d, with a hand-lever, F, that is fulcrumed on a cross-bar ofthe frame G. The frame G is mounted on the base-piece, and supports thebed H of the punching-machine centrally over the lever 0.

Between two curved standards, g, that are secured to the bed H, theslide I is fitted. This slide and the curved standards are slotted toreceive a bar, J, which is connected by rods 0 with a cross-bar, K,below the bed H.

On the eccentric b an eccentric-rod, 'f, is placed, which is connectedby means of a right and left hand screw, f, with the bar K, the end ofthe eccentricrod and the bar being apertured and threaded for receivingthe screw,

A hasp, L, is hinged to the upper part of the slide I, and is providedwith a pin, it, which projects through an aperture in the slide into anaperture in the bar J when it is required to move the slide I, and whenit is desired to oscillate the pendulum without moving the slide the pinit is withdrawn, when the bar J will move up or down in the slot.

The slide J and the bed H are provided with the usual devices forholding punches, shear-blades, or dies.'

By turning the screw f the distance between the upper and lower diemaybe varied. By moving the hand-lever up and down the pendulum isoscillated, and the slide I is moved up and down by the eccentric withgreat force, so that stamping or cutting, which were hitherto consideredtoo heavy for hand machines, in aybe readily done by this improvedmachine.

I am aware that it is not broadly new to operate the working parts ofmetal punching and shearing machines by means of pendulous or weightedlevers, and therefore desire to confine myself to the particularconstruction of parts hereinbefore described, which alone forms thesubject of the present invention.

'Havin g thus described my invention, I claim as new and desire tosecure by Letters Paen t 1. In a punching or shearing machine, the,

combination of the weighted pendulous lever O D, eccentric cross-head b,lever E, links (7,

JOSEPH T. BEDFORD.

Witnesses: Y

O. SEDGWIOK, GEO. M. HoPKiNs.

